No Buttons spawning after update

So no button is spawning at my large oil rig after the latest game update could you have a look and fix? 

confirm that plugin is loaded . as i have buttons on my server . 

o.reload HeavyRig
[CSharp] Started Oxide.Compiler v successfully
[Limit Entities] SOULREAPER_76 You have reached the limit 13164 of 4100 entities in this building
HeavyRig was compiled successfully in 1536ms
Failed to call hook 'Unload' on plugin 'HeavyRig v1.9.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.HeavyRig.Unload () [0x00000] in <0cb32a93936343ef9da0d281db2e3830>:0 
  at Oxide.Plugins.HeavyRig.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0021f] in <0cb32a93936343ef9da0d281db2e3830>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <112d89ea5d3348c8b949af0ab1a866d2>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <112d89ea5d3348c8b949af0ab1a866d2>:0 
Unloaded plugin Heavy Rig v1.9.1 by NooBlet
Failed to call hook 'OnServerInitialized' on plugin 'HeavyRig v1.9.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.HeavyRig.<SetupRigs>b__56_0 (MonumentInfo monument) [0x00015] in <2f4a43cac3304c09bf7938ae0b5506ab>:0 
  at System.Collections.Generic.List`1[T].ForEach (System.Action`1[T] action) [0x0001e] in <f98723dd4586469db5213ec59da723ca>:0 
  at Oxide.Plugins.HeavyRig.SetupRigs () [0x00005] in <2f4a43cac3304c09bf7938ae0b5506ab>:0 
  at Oxide.Plugins.HeavyRig.OnServerInitialized (System.Boolean initial) [0x0000d] in <2f4a43cac3304c09bf7938ae0b5506ab>:0 
  at Oxide.Plugins.HeavyRig.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0006a] in <2f4a43cac3304c09bf7938ae0b5506ab>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <112d89ea5d3348c8b949af0ab1a866d2>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <112d89ea5d3348c8b949af0ab1a866d2>:0 
Loaded plugin Heavy Rig v1.9.1 by NooBlet

This is the error I get when I reload the plugin and still no buttons and plugin loads

backup config... delete all files . reinstall plugin run with default config to confirm . 

Sorry to jump in.
I’m experiencing the same issue. As you mentioned, I deleted all the data and reinstalled it, but it didn’t work — I still get the same kind of error message.
 

your map . prog gen or custom

dis a small change to check for custom maps that might have null display phrases that will stop the load just before button spawn ... ... and thats all i can think it could be ... as i dont have this issue but we dont use custom maps , as you never have control what the map maker did on map

Thank you very much.
I have two servers, one using a procedural (proc gen) map and the other using a custom map, and I was experiencing the same kind of errors on both. I really appreciate the update. I’ll check it out.

Hello,
Since then, I have tested it again, but the NPCs get off the helicopter and just stay there without moving.
This issue occurred on a custom map. Could you please check this?

That is o  facepunch side and they do know about it someone posted about it in discord

Not the plugin . Certain seeds and maps this happens . Sometimes large sometimes small . This plugin  calls the chinook facepunxh way . By hacing crate . Notging this plugin does affects npc behavoiurs

Changed Status from Pending to Fixed

Thank you very much for your quick response and clarification.
I really appreciate your support and the detailed explanation.

no problem . in the support channel in discord . it was mentioned